I work on a PXE boot with preseed file in Debian 9. It run but I always crash on a menu "No common CD-ROM drive was detected" and I don't understand.The iso file is on a tftp server there is no CD-ROM/USB media, how can I shoot this window in the preseed file ?

It seems that your hardware is not recocnized by the Debian ISO. Maybe you need some nonfree firmware for the network card or a newer kernel.Please try the FAI.me service, which creates a customized ISO image, including non-free firmware and a backports kernel. Then you will see if this solves your problems.https://fai-project.org/FAIme